I think a reasonable viewer would conclude that the lack of any kind of official ATC/Aircrew liaison such the old Familiarisation Flight scheme is directly responsible for this us-and-them situation.
This is in blatent contravention of a safety recommendation from the AAIB, and supposedly accepted by the Regulator [CAA] and NATS.
Never assume that SAFETY figures as highly in new-NATS as it did in old-NATS.........although the figures show the opposite......a significant reduction in incident reporting of both serious and non-serious events over recent months!
Could this be a result of the unbelievably complex computerised report form which takes 30+ minutes to fill in, overseen directly by a management "assister" in the middle of the OPS room, and replaces a paper sheet which could be filled in whilst having a post-incident cup of coffee in the canteen??